Sitting apparatus



FIG. 1 is a perspective view of a design for a sitting apparatus according to the invention.

FIG. 2 is a top view of the design.

FIG. 3 is a bottom view of the design.

FIG. 4 is a front view of the design.

FIG. 5 is a rear view of the design.

FIG. 6 is a left side view of the design; and,

FIG. 7 is a right side view of the design. 

The ornamental design for a sitting apparatus, as shown and described. 